A fan duct includes an immovable cylinder and a movable cylinder. The movable cylinder is capable of sliding in an axial direction of the immovable cylinder. One of the immovable cylinder and the movable cylinder defines at least one groove in an axial direction thereof. Each groove defines at least two locating slots communicating with the respective groove. The other of the immovable cylinder and the movable cylinder forms at least one pin corresponding to the groove, the pin being capable of selectively sliding into any one of the locating slots. A related heat dissipation assembly including the fan duct is also disclosed.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A fan duct, including: an immovable cylinder; and a movable cylinder capable of sliding in an axial direction of the immovable cylinder, one of the immovable cylinder and the movable cylinder defining at least one groove in an axial direction thereof, each groove defining at least two locating slots spaced from each other in said axial direction, the other of the immovable cylinder and the movable cylinder forming at least one pin corresponding to said groove, said pin being capable of selectively sliding into any one of the locating slots; wherein said the other of the immovable cylinder and the movable cylinder covers all of the at least two slots and the at least one groove of the one of the immovable cylinder and the movable cylinder whenever the nin is located in any one of the locating slots.
2. The fan duct as claimed in claim 1 , wherein the groove is formed in the periphery of said one of the immovable cylinder and the movable cylinder, while the pin corresponding to the groove is formed on the inner wall of said the other of the immovable cylinder and the movable cylinder without groove therein.
3. The fan duct as claimed in claim 1 , wherein the groove is formed in the inner wall of said one of the immovable cylinder and the movable cylinder, while the pin corresponding to the groove is fanned on the periphery of the other of the immovable cylinder and the movable cylinder.
4. The fan duct as claimed in claim 1 , wherein an enlarged opening is defined at the top of the groove for guiding said pin to enter said groove.
5. The fan duct as claimed in claim 4 , wherein the enlarged opening has a trapezoid cross section.
6. The fan duct as claimed in claim 5 , wherein the enlarged opening has a super-side longer than a sub-side thereof.
7. The fan duct as claimed in claim 1 , wherein the locating slots extend in a circumferential direction of said one of the inunovable cylinder and the movable cylinder.
8. The fan duct as claimed in claim 1 , wherein the movable cylinder has an end expanded arid attached to a computer case.
9. A heat dissipation assembly, including: a beat sink; a fan for generating a forced airflow to improve heat dissipation of the heat sink; and a fan duct for guiding said forced airflow, the fan duct including: an immovable cylinder; and a movable cylinder capable of sliding in an axial direction of the immovable cylinder, one of the immovable cylinder and the movable cylinder defining at least one groove in an axial direction thereof, each groove defining at least two locating slots spaced from each other in said axial direction, the other of the immovable cylinder and the movable cylinder forming at least one pin corresponding to said groove, said pin being capable of selectively sliding into any one of the locating slots; wherein said the other of the immovable cylinder and the movable cylinder covers all of the at least two locatine slots and the at least one groove of the one of the immovable cylinder and the movable cylinder when the at least one pin of said the other of the immovable cylinder and the movable cylinder engaees into any of the at least two locating slots.
10. The heat dissipation assembly as claimed in claim 9 , wherein the groove is formed in the periphery of said one of the immovable cylinder and the movable cylinder, while the pin corresponding to the groove is formed on the inner wall of said the other of the immovable cylinder and the movable cylinder without groove therein.
11. The heat dissipation assembly as claimed in claim 9 , wherein the groove is formed in the inner wall of said one of the inirnovable cylinder and the movable cylinder, while the pin corresponding to the groove is formed on the periphery of the other of the immovable cylinder and the movable cylinder.
12. The heat dissipation assembly as claimed in claim 9 , wherein an enlarged opening is defined at the top of the groove for guiding said pinto enter said groove.
13. The heat dissipation assembly as claimed in claim 9 , wherein the locating slots extend in a circumferential direction of said one of the immovable cylinder and the movable cylinder.
14. The heat dissipation assembly as claimed in claim 9 , wherein the fan is mounted on the heat sink and one end of the fan duct is attached to the fan.
15. The heat dissipation assembly as claimed in claim 9 , wherein the immovable cylinder has a square board formed at a bottom thereof and attached to the fan.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
December 17, 2004
September 5, 2006
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